#### Answer

$v = 0.012~cm/s$

#### Work Step by Step

The minute hand of a clock moves through an angle of $2\pi$ radians in a time of 3600 seconds. We can find the angular speed:
$\omega = \frac{\theta}{t}$
$\omega = \frac{2\pi~rad}{3600~s}$
$\omega = \frac{\pi}{1800}~rad/s$
We can find the linear speed:
$v = \omega ~r$
$v = (\frac{\pi}{1800}~rad/s)(7~cm)$
$v = 0.012~cm/s$